page,
page :not(not) {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  border: none;
  outline: none;
}

.flex {
  display: flex;
  align-items: center;
  justify-content: center;
}

/*底部安全区*/
.bottom {
  padding-bottom: calc(8px + constant(safe-area-inset-bottom));
  padding-bottom: calc(8px + env(safe-area-inset-bottom));
}

.main {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  height: 100vh;
}

.main .content {
  flex: 1;
  overflow: hidden;
}
.btn :active {
  opacity: 0.7;
  transition: opacity 0.1s;
}
